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SERRE DE LA VOUTE TUNNEL IN DOUBLING THE TURIN-MODANE LINE

LA GALLERIA SERRE DE LA VOUTE NEL RADDOPPIO DELLA LINEA TORINO-MODANE

The new Serre de la Voute tunnel is part of the doubling of the Turin-Modane line, at present in progress between the stations of Bussoleno and Salbertrand. Its completion has made it possible to start traffic operations on a first section of the new line: namely that between Exilles and Salbertrand, due to the nature of the terrain in the area of the entrance of the tunnel on the Salbertrand side, and to the encountering in the excavation of this of a water-bearing stratum of such importance as to produce instability in the entire down-slope towards the Dora Riparia. The surveys carried out, the engineering works to form a tunnel-slope complex that would give a sufficient guarantee of stability, and other structures erected in connection with this are described.